<!doctype html>
<title>Selection.collapse() tests</title>
<div id=log></div>
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<script src=common.js></script>
<script>
"use strict";

function testCollapse(range, point) {
	selection.removeAllRanges();
	var addedRange;
	if (range) {
		addedRange = range.cloneRange();
		selection.addRange(addedRange);
	}

	if (point[0].nodeType == Node.DOCUMENT_TYPE_NODE) {
		assert_throws("INVALID_NODE_TYPE_ERR", function() {
			selection.collapse(point[0], point[1]);
		}, "Must throw INVALID_NODE_TYPE_ERR when collapse()ing if the node is a DocumentType");
		return;
	}

	if (point[1] < 0 || point[1] > getNodeLength(point[0])) {
		assert_throws("INDEX_SIZE_ERR", function() {
			selection.collapse(point[0], point[1]);
		}, "Must throw INDEX_SIZE_ERR when collapse()ing if the offset is negative or greater than the node's length");
		return;
	}

	selection.collapse(point[0], point[1]);

	assert_equals(selection.rangeCount, 1,
		"selection.rangeCount must equal 1 after collapse()");
	assert_equals(selection.focusNode, point[0],
		"focusNode must equal the node we collapse()d to");
	assert_equals(selection.focusOffset, point[1],
		"focusOffset must equal the offset we collapse()d to");
	assert_equals(selection.focusNode, selection.anchorNode,
		"focusNode and anchorNode must be equal after collapse()");
	assert_equals(selection.focusOffset, selection.anchorOffset,
		"focusOffset and anchorOffset must be equal after collapse()");
	if (range) {
		assert_equals(addedRange.startContainer, range.startContainer,
			"collapse() must not change the startContainer of a preexisting Range");
		assert_equals(addedRange.endContainer, range.endContainer,
			"collapse() must not change the endContainer of a preexisting Range");
		assert_equals(addedRange.startOffset, range.startOffset,
			"collapse() must not change the startOffset of a preexisting Range");
		assert_equals(addedRange.endOffset, range.endOffset,
			"collapse() must not change the endOffset of a preexisting Range");
	}
}

// Also test a selection with no ranges
testRanges.unshift("[]");

// Don't want to eval() each point a bazillion times
var testPointsCached = [];
for (var i = 0; i < testPoints.length; i++) {
	testPointsCached.push(eval(testPoints[i]));
}

var tests = [];
for (var i = 0; i < testRanges.length; i++) {
	var endpoints = eval(testRanges[i]);
	var range;
	test(function() {
		if (endpoints.length) {
			range = ownerDocument(endpoints[0]).createRange();
			range.setStart(endpoints[0], endpoints[1]);
			range.setEnd(endpoints[2], endpoints[3]);
		} else {
			// Empty selection
			range = null;
		}
	}, "Set up range " + i + " " + testRanges[i]);
	for (var j = 0; j < testPoints.length; j++) {
		tests.push(["Range " + i + " " + testRanges[i] + ", point " + j + " " + testPoints[j], range, testPointsCached[j]]);
	}
}

generate_tests(testCollapse, tests);

testDiv.style.display = "none";
</script>
